The Lake Superior Cacophonic Choir is always available to sing at music festivals, bar mitzvahs, bonfires or random moments when you least expect it. Contact them immediately for booking information. They accept beer as payment.
Here is a video of the choir performing at Fitger's Brewhouse during the Homegrown Music Festival in 2007.
And here is a video of the choir performing at Teatro Zuccone during the Drive: A Benefit for the Pelkey Family on Feb. 6, 2009.
The choir has two rules: 1) Once they start, they don't stop. 2) Cacophony forever.